Adjustable scaffold.



J. w. BOWERS.

ADJUSTABLE SCAF-FOLD.

APPLICATION FILED MAR. 14, 1916.

Patented Oct. 3,1916.

SHEETS-SHEET I.

J. W. BOWERS.

ADJUSTABLE SCAFFOLD.

APPLICATION man MAR. 14. L916.

Patented 0011.3,1916.

3 SHETS-SHEET 1 J. W. BOWERS.

ADJUSTABLE SCAFFOLD. APPLICATION HLED MAR. 14. 19's.

Patented Oct. 3,1916.

3 SHEETS-SHEET 3.

awwwto'c Z Gum/M1 4 ME News FEYERS c JoHNw. isowErts, or MARIETTA, OHIQ,

ADJUSTABLE soAFFoLD.

Specification of Letters Patent.

Patented Oct. 3,1916.

Application filed March 14, 1916. S eria11 To. '84,067.

T 0 all whom it may concern: 7

- Be it known that I, JOHN W. BoWERs, a citizen of the ,United States, resident of Marietta, in the county ofWashington and State ofOhio, have made a certain new and useful Invention in Adjustable scaffolds; and I declare the following to be a full, clear, and exact description of the same, such as will enable others skilled inth'e art to which it appears to make and use the invention, reference being had to theaccom-v panying drawings, and to letters or figures of reference marked thereon, which form a part'of'this specification.

The invention has relation to scaffolds,

having for its, object to provide 1 an im proved adjustable scaffold, combining ease and convenience of assemblage with the greatest possible rigidity in adjusted positlon.

Other objects and advantages will hereinafter appear.

The invention consists in the novel construction and combinations of parts, as hereinafter set forth.

In the accompanying drawings, illustrating the invention, Figure l is a rear view of the invention, with parts broken away, the standards being located upon uneven ground. Fig. 2 is a section on the line 22,

is'a detail plan view of "the lower staging bracket, showing the post in section. a Fig. 5'is a detail sectional view of the post, the channeled bracket, and the cross brace connection. F igL 6 is a detail sectional view of-the interfitting brackets and the cross brace connection.

In the drawings the numeral 2 designates posts or standards, spaced apart and connected by a cross-brace 3. and diagonal braces 4. Each post is provided at the inner side thereof with a pipe or rod 5, the upper ends ofthe diagonal braces having slidable engagement with said pipe at 6, and the ends of the cross braces 3 havingslidable engagement withsaid pipe at 7 ,through the medium of channeled brackets 8, closely engaging the pipe and bent partially around the. posts, to engage both the inner and outer sides thereof, removable bolts 9 looselyengaging alined perforations of the leaves of the brackets and any one of a series of perforations 11 of each post, to hold the crossposts.

brace" in positionas adjusted longitudinally of the posts. The pipes or rods 5 being offset from the faces of the posts 2, and the brackets 8 closely engaging both posts and rods, the brace connection 3 will effectually prevent any twisting movement of said The lower ends of the diagonal braces areslidably engaged with the crossbrace through two-part interfitting brackets 12, 12, each two-part bracket embracing extensible sections 3 of the crossbrace, a

bolt 13 engaging slots 13 of said sections,

alined perforations of the'bracket parts and a a perforation of the lower end'of the diagonal brace relating thereto. Upon loosening'thescrew-cap, llof said bolt, the twopart brackets may be slid longitudinally of the cross-brace, and the sections of the crossbrace may be extended or slid together, to provide for various adjustments.

A rearwardly extending inclined prop 15, composed of two downwardly-converging members 15", is also 'slidably engaged at the upper end of each member with the rod 5, intermediatelyof the diagonal brace and the cross-brace connections with said rod, the members of the prop being also composed each of extensible sections, having a clamp connection if The lower ends of V the prop members are provided respectively Fig.1, the upper staging bracket being shown as thrown back in dotted lines. Fig. 7 3 is a plan view of the invention. Fig. l

22, ahorizontal top 23 resting upon the post' and 'a vertical back 2% fitting against, the post, bolts 25 connecting the supportmember tothe post.' This staging bracket may be swung backwardly' upon its hinge, as

shown in dotted lines, Fig. 2, when its back 7 arm will rest squarely against theback of the support member, with its horizontal a block and tackle 31 from the support member of the upper braoket, and is pro vided with inturned flanges 33, engaging arm 26 extending rearwardly, in position v to bear against a wall of a building, to. brace the'poist at the top,'in which case the prop hereinafter described would not be staging 30 resting upon this extensible part.

'A lower staging bracket 31 is supported by slidably vertical grooves 34: of the post. This lower bracket is also provided with an extensible outer part 35, having a clampscrew 36 and upon which rests the lower staging 37.

Each pipe 5 engages at its upper end with the vertical arm of an .L-form iron 38, said iron being horizontally pivoted to the post at 89, and the lower end of said pipe is the pipe, which may then be swung back to normal position and the elongated pin reengaged therewith. This pin is prevented from dropping from the sleeve by a stop 4.4;,

upon the post, so that the pin and the sleeve are always at hand, ready for use. j

The lower staging bracket, as 1t is adjusted longitudinally of the posts by the block and tackle, is secured in position as adjusted by'bolts 46, engaging the perforations 11 of the post, said perforations serving a double purpose, being also designed for engagement by the bolts 9 of the channeled brackets.

For support of the scaffold upon uneven ground, each post is provided with an extension leg 47, engaging brackets 48 of the post, having a clamp-screw 49 to secure the adjustment.

The extenslble member of each staging bracket is provided with a forward projecting spike 50, the spikes being adapted for engagement with the wall of a building, and cooperating with the prop to support the scaffold.

hen the rod or pipe 5 is swung to one side upon its upper pivotal connection with the post, as stated, the channeled brackets 8 will be moved therewith from engagement with the posts, the securing bolts or pins 9 being first removed.

'I claim:

1. Inan adjustable scaffold, a post, a staging bracket thereupon, a longitudinal rod having at one end pivotal connection and at the other end rigid detachable connection with said post, and a brace member having slidable engagement with said rod.

2. In an adjustable scaffold, posts, staging brackets thereupon, offset longitudinal rods upon said posts, and a transverse brace having slidable laterally rigid engagement with said posts and said rods. i

3. In an adjustable scaffold, posts, staging brackets thereupon, offset longitudinal rods upon said posts,a transverse brace having slidable adjustment upon said posts and slidable engagement with said rods, and diagonal braces having slidable adjustment upon said rods and upon said transverse brace.

In an adjustable scaffold, posts, staging brackets thereupon, offset longitudinal rods having at one end pivotal connection and at the other end rigid detachable connection with said posts, and a transverse brace having slidable laterally rigid engagement with said posts and said rods. 7 r

5. In an adjustable scaffold, posts, staging brackets thereupon, offset longitudinal rods having at one end pivotal connection with said posts, bearing devices upon said posts, adjustable securing means carried by said bearing devices and capable of engagement with the free ends of said rods, and a transverse brace having slidable laterally rigid engagement with said posts and said rods.-

6. In an adjustable scaffold, posts, staging brackets thereupon, offset longitudinal hollow rods having at one end pivotal connection with said posts, bearing devices upon said posts, longitudinally ad ustable securin g pins carried by said bearing devlces and capable of engagement within the free ends of said hollow rods, and a transverse brace having slidable laterally rigid engagement with said posts and said rods.

7 In an adjustable scaffold, posts, staging brackets thereupon, offset longitudinal rods upon said posts, brace brackets having slidable laterally rigid engagement with said posts and said rods, and a transverse brace rigidly secured upon said brace brackets.

8. In an adjustable scaffold, posts, staging brackets thereupon, offset longitudinal rods upon said posts, brace brackets having a close sliding engagement with three faces of said posts and adjustably fixed thereupon and having slidable engagement with said rods, and a transverse brace rigidly secured upon said brace brackets. Y In testimony whereof I affix my signature, in presence of two witnesses. I JOHN W. BOWERS. Witnesses:

HOWARD L. SGHULTHEIS, CHARLES H. DANFORD.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents,

Washington, D. G. 

